The helicopter

 The helicopter is an aircraft that picked up and driven by one or more rotors (propeller) large horizontal. Helicopters are classified as-rotating wing aircraft to distinguish them from ordinary fixed-wing aircraft other. The word comes from the Greek helicopter helix (spiral) and pteron (wing). The helicopter operated by the machine invented by the inventor of Slovakia in January Bahyl.

Compared with other fixed-wing aircraft, helicopters are more complex and more expensive to buy and operate, rather slow, has a close distance and roaming charges are limited. While the advantage is its movement; helicopters capable of flying in space, backward, and take off and land vertically. Limited in the addition of fuel facilities and load / altitude, the helicopter can fly to any location, and land anywhere with a pitch of the rotor and a half in diameter. Called a helipad helipad.



source:http://latestcarextreme.blogspot.com/2011/03/history-of-helicopter-discovery.html